from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Informal A submarine chaser.
Sorry, no etymologies found.
There is the 1: 250 scale Lightship Ambrose, HMS Dreadnought, Admirable class minesweeper-subchaser and the old V108 Torpedo boat.
A very compact and efficient base was in process of completion and should, with the aid of the subchaser tender
But in the scope of this metaphor, the implication is that euthanizing the whales will somehow make room for "better" (sneer quotes) classes of whales to evolve that aren't disoriented by subchaser pings.